Introduction

In an European steelworks, the back-up rollers of a competitor failed after a short time in the test phase. Initially, the project was awarded to the competition. After multiple failures, NSK engineers were consulted for technical support and proposed to use NSK cylindrical roller bearings with optimised innerring sideswasher for an increased life time. The estimated lifetime is now at over 1,5 years without any failures. This helps to reduce the machine downtime and the maintenance cost drastically.

Rolling Mills
  • Cold Rolling Mill - 20-High Mill
Double
  • CRB Double Row - optimised innerring sidewasher

Key Facts

  • Cylindrical Roller Bearings for a 20-High Mill
  • Existing cylindrical roller bearings failed very short after installation
  • NSK proposed to use double row cylindrical roller bearings with optimised innerring sidewasher
  • An oil circulation lubrication helps for sufficient lubrication of the bearings
  • An approximately lifetime of over 1,5 year is expected

Value Proposals

  • Cylindrical Roller Bearings for a 20-High Mill
  • Existing cylindrical roller bearings failed very short after installation
  • NSK proposed to use double row cylindrical roller bearings with optimised innerring sidewasher
  • An oil circulation lubrication helps for sufficient lubrication of the bearings
  • An approximately lifetime of over 1,5 year is expected

Product Features

  • Cylindrical Roller Bearings for a 20-High Mill
  • Existing cylindrical roller bearings failed very short after installation
  • NSK proposed to use double row cylindrical roller bearings with optimised innerring sidewasher
  • An oil circulation lubrication helps for sufficient lubrication of the bearings
  • An approximately lifetime of over 1,5 year is expected
Cost Saving Breakdown
Before Cost p.a. NSK Solution Cost p.a.
Bearing Costs € 456 000 Bearing Costs € 250 488
Engineering Costs € 6 400 Engineering Costs € 1 600
Costs of lost production € 60 000 Costs of lost production € 0
Total Costs € 522 400 € 252 088

Reference:SS-E-1-956